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<title>Function template integrate_n_steps</title>
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<a name="boost.numeric.odeint.integrate_n_steps_idm23389"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle">Function template integrate_n_steps</span></h2>
<p>boost::numeric::odeint::integrate_n_steps — The same function as above, but without checker. </p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../../header/boost/numeric/odeint/integrate/integrate_n_steps_hpp.html" title="Header &lt;boost/numeric/odeint/integrate/integrate_n_steps.hpp&gt;">boost/numeric/odeint/integrate/integrate_n_steps.hpp</a>&gt;

</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Stepper<span class="special">,</span> <span class="keyword">typename</span> System<span class="special">,</span> <span class="keyword">typename</span> State<span class="special">,</span> <span class="keyword">typename</span> Time<span class="special">,</span> 
         <span class="keyword">typename</span> Observer<span class="special">&gt;</span> 
  <span class="identifier">Time</span> <span class="identifier">integrate_n_steps</span><span class="special">(</span><span class="identifier">Stepper</span> stepper<span class="special">,</span> <span class="identifier">System</span> system<span class="special">,</span> <span class="identifier">State</span> <span class="special">&amp;</span> start_state<span class="special">,</span> 
                         <span class="identifier">Time</span> start_time<span class="special">,</span> <span class="identifier">Time</span> dt<span class="special">,</span> <span class="identifier">size_t</span> num_of_steps<span class="special">,</span> 
                         <span class="identifier">Observer</span> observer<span class="special">)</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idm24788"></a><h2>Description</h2>
<p>Integrates the ODE with constant step size.</p>
<p>This function is similar to integrate_const. The observer is called at equidistant time intervals t0 + n*dt. If the Stepper is a normal stepper without step size control, dt is also used for the numerical scheme. If a ControlledStepper is provided, the algorithm might reduce the step size to meet the error bounds, but it is ensured that the observer is always called at equidistant time points t0 + n*dt. If a DenseOutputStepper is used, the step size also may vary and the dense output is used to call the observer at equidistant time points. The final integration time is always t0 + num_of_steps*dt. If a <code class="computeroutput"><a class="link" href="max_step_checker.html" title="Class max_step_checker">max_step_checker</a></code> is provided as StepOverflowChecker, a no_progress_errror is thrown if too many steps (default: 500) are performed without progress, i.e. in between observer calls. If no checker is provided, no such overflow check is performed.</p>
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<td><p><span class="term">Parameters:</span></p></td>
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<td><p><span class="term"><code class="computeroutput">dt</code></span></p></td>
<td><p>The time step between observer calls, <span class="emphasis"><em>not</em></span> necessarily the time step of the integration. </p></td>
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<td><p><span class="term"><code class="computeroutput">num_of_steps</code></span></p></td>
<td><p>Number of steps to be performed </p></td>
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<td><p><span class="term"><code class="computeroutput">observer</code></span></p></td>
<td><p>Function/Functor called at equidistant time intervals. </p></td>
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<td><p><span class="term"><code class="computeroutput">start_state</code></span></p></td>
<td><p>The initial condition x0. </p></td>
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<td><p><span class="term"><code class="computeroutput">start_time</code></span></p></td>
<td><p>The initial time t0. </p></td>
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<td><p><span class="term"><code class="computeroutput">stepper</code></span></p></td>
<td><p>The stepper to be used for numerical integration. </p></td>
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<td><p><span class="term"><code class="computeroutput">system</code></span></p></td>
<td><p>Function/Functor defining the rhs of the ODE. </p></td>
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<td><p><span class="term">Returns:</span></p></td>
<td><p>The number of steps performed. </p></td>
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<td align="right"><div class="copyright-footer">Copyright © 2009-2015 Karsten Ahnert and Mario Mulansky<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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